Denso BHT-7500 - Manual (Page 100)

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If any error occurs, the BHT beeps three times and
shows the screen at left.
In parentheses are error codes which have the
following meanings:
(X X)
1: The received data is different from
the sent data.
2: A timeout has occurred during
standby for data reception.
1: 300 bps
2: 115200 bps
Testing the direct-connect interface port
Selecting the "2:CONNECTOR" on the TEST COM-
MUNICATION menu displays the screen shown at
left and then starts testing the direct-connect in-
terface port.
Upon normal completion of the test, the tested
slave BHT beeps once and shows the screen at
left.
Press the C key to return to the TEST COMMUNI-
CATION menu.
The master BHT will automatically return to the
TEST COMMUNICATION menu.
TEST COMMUNICATION
< OPTICAL >
** Test OK **
TEST COMMUNICATION
< CONNECTOR >
** Testing **
TEST COMMUNICATION
< CONNECTOR >
** Test NG **
(XX)
Press the C key to return to the TEST COMMUNI-
CATION menu.